Have a hero with 3 cross-class skills
Defeat Galilarn, an outspoken opponent of mattresses.
Cause a physics chain reaction involving at least 6 units or objects, using a single basic physics ability.
Finish Act I
Defeat Gharzan Crunchybones, the world-renowned Kazoo player and amateur ominous last speech maker.
Cancel an enemy Overwatch.
Knock down a tree.
Finish Act III on Normal or higher
Level up a unit to max level.
Trigger Overwatch or Attack of Opportunity twice using a single Frighten.
Use lift on an enemy\object, then push it into something.
Trigger Overwatch by using lift on an enemy behind full cover.
Trigger Attack of Opportunity during your turn using Lift or Physics 10 times.
Push a potion into a unit (friendly or enemy).
Heal an enemy by pushing a healing urn into it.
Stun an enemy for three turns consecutively.
Stun all enemies (minimum 4) in a single turn.
Finish Act III on Classic or higher
Finish Act II
Kill three enemies using a single basic physics ability.
Save an unappreciative ally.
Stun or kill 2 enemies by pushing them into each other using a single basic physics ability.
Kill 10 enemies by knocking down objects on them using physics abilities.
Push\Pull 10 objects or units using physics abilities.
Win a Skirmish with every faction.
Finish Act III on Legendary
Stun or kill 4 enemies by pushing them into each other using a single basic physics ability.